//package com.ruoyi.custom.service.impl;
//
//import org.apache.ibatis.annotations.Result;
//import org.springframework.stereotype.Service;
//
//public class CouponServiceImpl {
//
//    public interface CouponService extends IService<Coupon> {
//
//        Result receiveCoupon(Long userId, Long couponId);
//
//        CompletableFuture<Boolean> batchSendCoupon(Long couponId, List<Long> userIds);
//        List<Coupon> getAvailableCoupons(Long userId);
//    }
//
//    @Service
//    public class CouponServiceImpl extends ServiceImpl<CouponMapper, Coupon> implements CouponService {
//        @Autowired
//        private CouponMapper couponMapper;
//        @Autowired
//        private UserCouponMapper userCouponMapper;
//        @Autowired
//        private StringRedisTemplate redisTemplate;
//
//        // 实现receiveCoupon、batchSendCoupon等方法（逻辑同前，略）
//        @Override
//        public List<Coupon> getAvailableCoupons(Long userId) {
//            return couponMapper.selectAvailableCoupons(userId);
//        }
//    }
//}
